3-
5
3. Test & debug flow
TEST
Check the AC Voltage
Power PCBA(110V or 220V)
NO
Replace power PCBA or
AC transformer.
YES
Switch on the Power PCBA
Is the DC Voltage
outputs OK?
(5V,3.3V,
9
V,12V
,15V
)
Repair or Replace Power PCBA
NO
Make sure the main PCBA don't
short on VCCs and switch it on.
YES
Is 3.3V
,1.8V
and
2V
DC
outputs normal on main
PCBA?
Check the regulators or related diodes.
NO
YES
Insert the upgrade disc to update
the FLASH memory code.
Update FLASH
successfully?
A
YES
NO
1. Check 27MHz system clock.
2. Check system reset circuit.
3. Check FLASH R/W enable signal
LOE#
,WR
LL
.
4. Check
servo related circuit
.
5. Check FLASH Memory related circuit.
Содержание M55
Страница 26: ...2 SDRAM CLOCK FIG 2 1 3 TRAY OPEN CLOSE SIGNAL CH1 EJ CH2 EJ FIG 3 1 3 12 ...
Страница 28: ...5 LENS CONTROL RELATED SIGNAL NO DISC CONDITION LDON FIG 5 1 CH1 DVD_LD CH2 CD_LD FIG 5 2 3 14 ...
Страница 29: ...6 FOCUS CONTROL RELATED SIGNAL NO DISC CONDITION FSCON FIG 6 1 CH1 FOCUS CH2 FOCUS FIG 6 2 3 15 ...
Страница 30: ...7 SPINDLE CONTROL WAVEFORM CH1 SPWM2 CH2 SPWM1 FIG 7 1 DVD CH1 SPWM2 CH2 SPWM1 FIG 7 2 CD 3 16 ...
Страница 31: ...8 FOCUS ON WAVEFORM FSCON FIG 8 1 CD FIG 8 2 DVD 3 17 ...
Страница 33: ...FIG 10 2 480P FIG 10 3 720P FIG 10 4 1080I 3 19 ...
Страница 34: ...11 RF WAVEFORM FIG11 1 CD FIG11 1 DVD 12 HDMI CH1 HSYN CH2 VSYN FIG12 1 480I 3 20 ...
Страница 35: ...CH1 HSYN CH2 VSYN FIG12 1 480P CH1 HSYN CH2 VSYN FIG12 1 720P CH1 HSYN CH2 VSYN FIG12 2 1080I 3 21 ...
Страница 36: ...13 ES6168F AUDIO OUTPUT TO AUDIO DAC CHI1 BITCLOCK CH2 LRCLOCK FIG 31 1 14 AUDIO OUTPUT 1KHZ 0DB FIG 14 1 3 22 ...
Страница 65: ...HS4 DVD_B008 VM1 0 RS232 P1 J2 1 6 5 RS232 P C BOARD TOP VIEW BOTTOM VIEW 3 64 ...